US20020129597A1 - Temperature management of catalyst system for a variable displacement engine - Google Patents
Temperature management of catalyst system for a variable displacement engine Download PDFInfo
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- US20020129597A1 US20020129597A1 US09/683,933 US68393302A US2002129597A1 US 20020129597 A1 US20020129597 A1 US 20020129597A1 US 68393302 A US68393302 A US 68393302A US 2002129597 A1 US2002129597 A1 US 2002129597A1
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- temperature
- emission control
- engine
- cylinders
- variable displacement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2046—Periodically cooling catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/06—Cutting-out cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/184—Number of cylinders ten
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0802—Temperature of the exhaust gas treatment apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
Description
- This application is a continuation of co-pending and commonly owned U.S. patent application Ser. No. 09/732,262, filed Dec. 7, 2000, now U.S. Pat. No.6,______, the disclosure of which is incorporated by reference in its entirety.
- 1. Field of the Invention
- The present invention relates to a system and method for controlling a variable displacement engine to manage temperature of a catalyst system.
- 2. Background Art
- Fuel economy for a multi-cylinder internal combustion engine can be improved by deactivating some of the engine cylinders under certain operating conditions. Reducing the number of operating cylinders reduces the effective displacement of the engine such that it is sometimes referred to as a variable displacement engine. Depending upon the particular configuration of the variable displacement engine, one or more cylinders may be selectively deactivated to improve fuel economy under light load conditions. In some configurations, a group of cylinders, which may be an entire bank of cylinders, is selectively deactivated.
- Reducing the number of operating cylinders may also reduce the operating temperature of various engine and/or vehicle components which may adversely affect desired engine operation. For example, certain emission control devices, such as catalytic converters, require a minimum operating temperature for efficient operation. One approach to raise catalyst temperature involves enriching the fuel supply to the operating cylinders when catalyst temperature drops below a specified level as disclosed in U.S. Pat. No. 4,467,602. This method assumes that excess air is available in the catalytic converter to be effective. The inventors herein have recognized that this assumption may not always be valid and may result in reduced catalyst and/or engine efficiency during certain operating conditions.
- An object of the present invention is to provide a system and method for controlling a variable displacement internal combustion engine to effectively manage the temperature of one or more engine and/or vehicle components.
- In carrying out the above object and other objects, advantages and features of the invention, a system and method for controlling a variable displacement internal combustion engine include controlling the number or ratio of active/inactive cylinders to control the temperature of at least one engine or vehicle component. In one preferred embodiment, the system and method include controlling a variable displacement engine having a bank configuration with a close-coupled catalyst associated with each bank of cylinders and at least one downstream or underbody catalyst by activating the second bank of cylinders when one of the catalysts is determined to be near or below a minimum efficient operating temperature.
- The present invention provides a number of advantages. For example, the present invention manages the temperature of one or more engine/vehicle components to maintain a desired operating efficiency while also efficiently operating the engine.
- The above advantage and other advantages, objects and features of the present invention will be readily apparent from the following detailed description of the preferred embodiments when taken in connection with the accompanying drawings.
- FIG. 1 is a block diagram illustrating operation of one embodiment for a system or method for controlling a variable displacement engine according to the present invention;
- FIG. 2 is a block diagram illustrating operation of another embodiment for a system or method for controlling a variable displacement engine according to the present invention;
- FIG. 3 is a logic diagram illustrating a reactivation strategy for cylinders of a variable displacement engine to manage component temperature according to one embodiment of the present invention; and
- FIG. 4 is a flow diagram illustrating operation of one embodiment for a system or method for controlling a variable displacement engine according to the present invention.
- A block diagram illustrating an engine control system for a representative internal combustion engine operable in a variable displacement mode to manage temperature of an engine/vehicle component according to the present invention is shown in FIG. 1.
System 10 preferably includes aninternal combustion engine 12 having a plurality of cylinders, represented bycylinder 14. In one preferred embodiment,engine 12 includes ten cylinders arranged in a “V” configuration having two cylinder banks with five cylinders each. As used herein, a cylinder bank refers to a related group of cylinders having a common characteristic, such as being located proximate one another, having a common emission control device (ECD), or related according to firing order, for example. As such, cylinder banks can also be defined for in-line cylinder configurations as well. - As one of ordinary skill in the art will appreciate,
system 10 includes various sensors and actuators to effect control of the engine. One or more sensors or actuators may be provided for eachcylinder 14, or a single sensor or actuator may be provided for the engine. For example, eachcylinder 14 may include four actuators which operate corresponding intake and exhaust valves, while only including a single engine coolant temperature sensor. -
System 10 preferably includes acontroller 16 having a microprocessor 18 in communication with various computer-readable storage media, indicated generally byreference numeral 20. The computer readable storage media preferably include a read-only memory (ROM) 22, a random-access memory (RAM) 24, and a keep-alive memory (KAM) 26. As known by those of ordinary skill in the art, KAM 26 is used to store various operating variables whilecontroller 16 is powered down but is connected to the vehicle battery. Computer-readable storage media 20 may be implemented using any of a number of known memory devices such as PROMs, EPROMs, EEPROMs, flash memory, or any other electric, magnetic, optical, or combination memory device capable of storing data, some of which represents executable instructions, used by microprocessor 18 in controlling the engine. Microprocessor 18 communicates with the various sensors and actuators via an input/output (I/O)interface 32. Of course, the present invention could utilize more than one physical controller, such ascontroller 16, to provide engine/vehicle control depending upon the particular application. - In operation, air passes through
intake 34 where it may be distributed to the plurality of cylinders via an intake manifold, indicated generally byreference numeral 36.System 10 preferably includes amass airflow sensor 38 which provides a corresponding signal (MAF) to controller 16 indicative of the mass airflow. If no mass airflow sensor is present, a mass airflow value may be inferred from various engine operating parameters. Athrottle valve 40 may be used to modulate the airflow throughintake 34 during certain operating modes.Throttle valve 40 is preferably electronically controlled by anappropriate actuator 42 based on a corresponding throttle position signal generated bycontroller 16. A throttle position sensor provides a feedback signal (TP) indicative of the actual position ofthrottle valve 40 to controller 16 to implement closed-loop control ofthrottle valve 40. - As illustrated in FIG. 1, a manifold
absolute pressure sensor 46 may be used to provide a signal (MAP) indicative of the manifold pressure to controller 16. Air passing throughintake 34 enters the combustion chambers orcylinders 14 through appropriate control of one or more intake valves. The intake and exhaust valves may be controlled directly or indirectly bycontroller 16 along with ignition timing (spark) and fuel to selectively activate/deactivate one ormore cylinders 12 to provide variable displacement operation. Afuel injector 48 injects an appropriate quantity of fuel in one or more injection events for the current operating mode based on a signal (FPW) generated bycontroller 16 processed by an appropriate driver. Control of the fuel injection events is generally based on the position of the pistons withinrespective cylinders 14. Position information is acquired by an appropriate crankshaft sensor which provides a position signal (PIP) indicative of crankshaft rotational position. At the appropriate time during the combustion cycle,controller 16 generates a spark signal (SA) which is processed byignition system 58 to controlspark plug 60 and initiate combustion within an associatedcylinder 14. - Controller16 (or a camshaft arrangement) controls one or more exhaust valves to exhaust the combusted air/fuel mixture of activated or running cylinders through an associated exhaust manifold, indicated generally by
reference numeral 28. Depending upon the particular engine configuration, one or more exhaust manifolds may be used. In one preferred embodiment,engine 12 includes anexhaust manifold 28 associated with each bank of cylinders as illustrated in FIG. 1. - An exhaust gas oxygen sensor62 is preferably associated with each bank of cylinders and provides a signal (EGO) indicative of the oxygen content of the exhaust gases to controller 16. The present invention is independent of the particular type of exhaust gas oxygen sensor utilized, which may depend on the particular application. In one embodiment, heated exhaust gas oxygen sensors (HEGO) are used. Of course, various other types of air/fuel ratio sensors/indicators may be used such as a universal exhaust gas oxygen sensor (UEGO), for example. The exhaust gas oxygen sensor signals may be used to independently adjust the air/fuel ratio, or control the operating mode of one or more cylinders or banks of cylinders. The exhaust gas passes through the
exhaust manifolds 28 through associated upstreamemission control devices gas oxygen sensor 66 and through a downstreamemission control device 68 before flowing past a catalyst monitoring sensor 70 (typically another exhaust gas oxygen sensor) and being exhausted to atmosphere. - A
temperature sensor 72 may be provided to monitor the temperature of a catalyst withinemission control device 68, depending upon the particular application. Alternatively, the temperature may be estimated using an appropriate temperature model based on various other sensed engine/vehicle parameters which may include mass airflow, manifold absolute pressure or load, engine speed, air temperature, engine coolant temperature, and/or engine oil temperature, for example. A representative temperature model could be developed to determine catalyst temperature for any one of theemission control devices - According to the present invention,
controller 16 manages temperature of one or more engine/vehicle components, such asemission control devices engine 12 is a V-10 engine with variable displacement operation provided by selectively deactivating one bank of cylinders under appropriate engine and/or vehicle operating conditions, such as light load, for example. The deactivated cylinder bank may then be selectively activated to maintain efficient operation of one or more emission control devices. For example, the second cylinder bank may be reactivated to maintain the temperature ofemission control device 68 sufficiently above the catalyst light-off temperature to maintain efficient operation. The cylinder bank is then deactivated after the temperature exceeds a corresponding threshold to provide hysteresis, or to reduce the operating temperature to prolong component life, for example, as explained in greater detail below. - Referring now to FIG. 2, an alternative embodiment for controlling a variable displacement engine to manage temperature of an engine/vehicle component according to the present invention is shown. As will be recognized by those of ordinary skill in the art,
system 100 includes similar components as described with reference to the embodiment illustrated in FIG. 1 and incorporated here by reference.Internal combustion engine 102 includes twocylinder banks emission control device bank emission control device emission control devices - As also illustrated in FIG. 2, each ECD has an associated exhaust
gas oxygen sensor gas oxygen sensors downstream ECDs Downstream ECDs temperature sensors controller 132 to manage the temperature of one or more of the ECDs as described herein. It should be recognized by those of ordinary skill in the art that the temperature of one or more engine/vehicle components can be modeled as described above with reference to the embodiment illustrated in FIG. 1. Component temperature modeling may be used alone or in combination with one or more temperature sensors to provide temperature management according to the present invention. One of ordinary skill in the art will also recognize that a variety of engine/vehicle operating parameters influence the current operating mode and selective activation/deactivation of one or more cylinders to provide variable displacement operation. These parameters may affect or override the decision to activate/deactivate cylinders to provide the temperature management features in accordance with the present invention. - The diagrams of FIGS. 3 and 4 generally represent control logic for one embodiment of a system or method according to the present invention. As will be appreciated by one of ordinary skill in the art, the diagrams may represent any one or more of a number of known processing strategies such as event-driven, interrupt-driven, multi-tasking, multi-threading, and the like. As such, various steps or functions illustrated may be performed in the sequence illustrated, in parallel, or in some cases omitted. Likewise, the order of processing is not necessarily required to achieve the objects, features, and advantages of the invention, but is provided for ease of illustration and description. Although not explicitly illustrated, one of ordinary skill in the art will recognize that one or more of the illustrated steps or functions may be repeatedly performed depending upon the particular processing strategy being used.
- Preferably, the control logic is implemented primarily in software executed by a microprocessor-based engine controller. Of course, the control logic may be implemented in software, hardware, or a combination of software and hardware depending upon the particular application. When implemented in software, the control logic is preferably provided in a computer-readable storage medium having stored data representing instructions executed by a computer to control the engine. The computer-readable storage medium or media may be any of a number of known physical devices which utilize electric, magnetic, and/or optical devices to temporarily or persistently store executable instructions and associated calibration information, operating variables, and the like.
-
Block 150 of FIG. 3 represents monitoring of at least one engine or vehicle component such as an emission control device (END). In this embodiment, block 150 determines whether an upstream ECD is above a corresponding or associated temperature threshold. For example, the temperature threshold may correspond to be light-off temperature of a three-way catalyst.Block 152 determines whether a downstream ECD is above a corresponding temperature. The downstream ECD may be associated with a single upstream device, as illustrated in FIG. 2, or shared by multiple upstream devices as illustrated in FIG. 1. If the upstream ECD is above the corresponding temperature threshold as determined byblock 150 and the downstream ECD is above its associated temperature threshold as determined byblock 152, all cylinders are operated under closed-loop control with a normal scheduled air/fuel ratio and spark or ignition timing as represented byblock 154. - If the upstream component is below its associated temperature threshold as indicated by
block 150, or the downstream component is below its associated temperature threshold as indicated byblock 152, block 156 determines whether an associated exhaust gas oxygen sensor is available in providing information sufficient to operate closed-loop. In this particular embodiment, block 156 determines whether an associated HEGO sensor has reached an appropriate operating temperature to provide reliable information with respect to the oxygen content of the exhaust gas. If the associated HEGO is ready for closed-loop operation as determined byblock 156, the previously deactivated cylinders are activated with a lean bias on the air/fuel ratio and spark retarded from MBT. The previously running or activated cylinders are operated with a rich bias air/fuel ratio. All cylinders are operated using closed-loop control of air/fuel ratio based on the HEGO sensor reading with appropriate lean/rich bias as represented byblock 158. In one embodiment, an entire bank of cylinders is activated and operated with a lean bias and retarded spark until the downstream ECD reaches its temperature threshold as determined byblock 152. - If the HECO sensor associated with the ECD is not ready for closed-loop operation as determined by
block 156, the engine is controlled to activate the deactivated cylinders and operate them open-loop with a lean air/fuel ratio and spark retarded from MBT as represented byblock 160. The previously activated or running cylinders are operated with a rich bias air/fuel ratio in closed-loop mode. - FIG. 4 provides an alternative representation of operation for a system or method to manage temperature of an engine/vehicle component according to the present invention.
Block 180 represents monitoring of at least one catalyst temperature using a temperature model as represented byblock 182 and/or an associated temperature sensor as represented byblock 184. The engine/vehicle component, in this embodiment a catalyst, is monitored and managed by controlling activation of at least one cylinder in a variable displacement operating mode to control the temperature of the component. In this example, block 186 compares the catalyst temperature to a low temperature threshold. If the temperature is below the associated low temperature threshold, block 192 activates one or more deactivated cylinders to raise the temperature of the catalyst.Block 194 controls the air/fuel ratio and/or spark using open-loop, closed-loop, or a combination, to control the various cylinders as described with reference to FIG. 3 above. In one embodiment, block 192 activates an entire bank of deactivated cylinders. Preferably, control of the activated and deactivated cylinders is coordinated during reactivation such that the combined exhaust approaches a stoichiometric air/fuel ratio. -
Block 188 of FIG. 4 represents comparing the catalyst temperature to an associated high temperature threshold to trigger deactivation of one or more cylinders as represented byblock 190. The comparison represented byblock 188 may be used to provide appropriate hysteresis to avoid hunting or cycling of the deactivated cylinders. Alternatively, or in combination, a temperature threshold may be provided as one form of component protection to reduce or prevent premature reduction of the catalyst conversion efficiency. - As such, the present invention manages the temperature of one or more engine/vehicle components such as an emission control device to maintain a desired operating efficiency while also efficiently operating the engine.
- While the best mode for carrying out the invention has been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention as defined by the following claims.
Claims (19)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US09/683,933 US6739123B2 (en) | 2000-12-07 | 2002-03-05 | Temperature management of catalyst system for a variable displacement engine |
US10/838,942 US6938410B2 (en) | 2000-12-07 | 2004-05-03 | Temperature management of catalyst system for a variable displacement engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/732,262 US6415601B1 (en) | 2000-12-07 | 2000-12-07 | Temperature management of catalyst system for a variable displacement engine |
US09/683,933 US6739123B2 (en) | 2000-12-07 | 2002-03-05 | Temperature management of catalyst system for a variable displacement engine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/732,262 Continuation US6415601B1 (en) | 2000-12-07 | 2000-12-07 | Temperature management of catalyst system for a variable displacement engine |
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US10/838,942 Continuation US6938410B2 (en) | 2000-12-07 | 2004-05-03 | Temperature management of catalyst system for a variable displacement engine |
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US6739123B2 US6739123B2 (en) | 2004-05-25 |
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US09/732,262 Expired - Lifetime US6415601B1 (en) | 2000-12-07 | 2000-12-07 | Temperature management of catalyst system for a variable displacement engine |
US09/683,933 Expired - Lifetime US6739123B2 (en) | 2000-12-07 | 2002-03-05 | Temperature management of catalyst system for a variable displacement engine |
US10/838,942 Expired - Lifetime US6938410B2 (en) | 2000-12-07 | 2004-05-03 | Temperature management of catalyst system for a variable displacement engine |
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US09/732,262 Expired - Lifetime US6415601B1 (en) | 2000-12-07 | 2000-12-07 | Temperature management of catalyst system for a variable displacement engine |
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US10/838,942 Expired - Lifetime US6938410B2 (en) | 2000-12-07 | 2004-05-03 | Temperature management of catalyst system for a variable displacement engine |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070079795A1 (en) * | 2005-10-12 | 2007-04-12 | Gebby Brian P | Method of managing engine torque upon loss of engine coolant |
WO2015163892A1 (en) * | 2014-04-24 | 2015-10-29 | Cummins Inc. | Cylinder deactivation for catalyst drying |
US10690071B1 (en) * | 2018-12-12 | 2020-06-23 | Denso International America, Inc. | Control system for variable displacement engine |
US10690036B1 (en) | 2018-12-20 | 2020-06-23 | Denso International America, Inc. | Diagnostic test for engine exhaust system |
US10781762B2 (en) | 2018-12-12 | 2020-09-22 | Denso International America, Inc. | Control system for variable displacement engine |
US10961930B2 (en) | 2018-12-12 | 2021-03-30 | Denso International America, Inc. | Control system for variable displacement engine |
Families Citing this family (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002013420A (en) * | 2000-06-28 | 2002-01-18 | Toyota Motor Corp | Cylinder fuel injection type spark ignition internal combustion engine |
US6415601B1 (en) * | 2000-12-07 | 2002-07-09 | Ford Global Technologies, Inc. | Temperature management of catalyst system for a variable displacement engine |
GB0104025D0 (en) * | 2001-02-19 | 2001-04-04 | Ford Global Tech Inc | Engine with controlled auto-ignition |
WO2003048548A1 (en) | 2001-11-30 | 2003-06-12 | Delphi Technologies, Inc. | Cylinder deactivation to improve vehicle interior heating |
US6922986B2 (en) * | 2001-12-14 | 2005-08-02 | General Motors Corporation | Catalytic converter early light off using cylinder deactivation |
JP3963105B2 (en) * | 2002-01-18 | 2007-08-22 | 日産自動車株式会社 | Control device for internal combustion engine |
US7168239B2 (en) * | 2002-06-04 | 2007-01-30 | Ford Global Technologies, Llc | Method and system for rapid heating of an emission control device |
US6568177B1 (en) | 2002-06-04 | 2003-05-27 | Ford Global Technologies, Llc | Method for rapid catalyst heating |
US6736120B2 (en) * | 2002-06-04 | 2004-05-18 | Ford Global Technologies, Llc | Method and system of adaptive learning for engine exhaust gas sensors |
US7111450B2 (en) * | 2002-06-04 | 2006-09-26 | Ford Global Technologies, Llc | Method for controlling the temperature of an emission control device |
US7032572B2 (en) * | 2002-06-04 | 2006-04-25 | Ford Global Technologies, Llc | Method for controlling an engine to obtain rapid catalyst heating |
US20050193988A1 (en) * | 2004-03-05 | 2005-09-08 | David Bidner | System for controlling valve timing of an engine with cylinder deactivation |
US6758185B2 (en) * | 2002-06-04 | 2004-07-06 | Ford Global Technologies, Llc | Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics |
US6868827B2 (en) * | 2002-06-04 | 2005-03-22 | Ford Global Technologies, Llc | Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device |
US6725830B2 (en) * | 2002-06-04 | 2004-04-27 | Ford Global Technologies, Llc | Method for split ignition timing for idle speed control of an engine |
US6736121B2 (en) | 2002-06-04 | 2004-05-18 | Ford Global Technologies, Llc | Method for air-fuel ratio sensor diagnosis |
US6735938B2 (en) | 2002-06-04 | 2004-05-18 | Ford Global Technologies, Llc | Method to control transitions between modes of operation of an engine |
JP3824983B2 (en) * | 2002-09-04 | 2006-09-20 | 本田技研工業株式会社 | An air-fuel ratio control device for an internal combustion engine that stops the operation of the identifier during lean operation |
US6857264B2 (en) * | 2002-12-19 | 2005-02-22 | General Motors Corporation | Exhaust emission aftertreatment |
JP2005009364A (en) * | 2003-06-17 | 2005-01-13 | Honda Motor Co Ltd | Cylinder deactivation control device for multi-cylinders internal combustion engine |
US6962143B2 (en) * | 2003-07-16 | 2005-11-08 | Southwest Research Institute | High-efficiency, low emission gasoline engines for heavy-duty applications |
JP3842768B2 (en) * | 2003-08-26 | 2006-11-08 | 株式会社東芝 | Service search apparatus and service search method |
EP1522701A1 (en) * | 2003-10-09 | 2005-04-13 | Ford Global Technologies, LLC, A subsidary of Ford Motor Company | Multicylinder internal combustion engine and method for cylinder cut-off |
US7044885B2 (en) | 2004-03-05 | 2006-05-16 | Ford Global Technologies, Llc | Engine system and method for enabling cylinder deactivation |
US7000602B2 (en) * | 2004-03-05 | 2006-02-21 | Ford Global Technologies, Llc | Engine system and fuel vapor purging system with cylinder deactivation |
US7073494B2 (en) * | 2004-03-05 | 2006-07-11 | Ford Global Technologies, Llc | System and method for estimating fuel vapor with cylinder deactivation |
US7086386B2 (en) * | 2004-03-05 | 2006-08-08 | Ford Global Technologies, Llc | Engine system and method accounting for engine misfire |
US7028670B2 (en) * | 2004-03-05 | 2006-04-18 | Ford Global Technologies, Llc | Torque control for engine during cylinder activation or deactivation |
US7073322B2 (en) * | 2004-03-05 | 2006-07-11 | Ford Global Technologies, Llc | System for emission device control with cylinder deactivation |
US7021046B2 (en) * | 2004-03-05 | 2006-04-04 | Ford Global Technologies, Llc | Engine system and method for efficient emission control device purging |
US7159387B2 (en) | 2004-03-05 | 2007-01-09 | Ford Global Technologies, Llc | Emission control device |
US6978204B2 (en) * | 2004-03-05 | 2005-12-20 | Ford Global Technologies, Llc | Engine system and method with cylinder deactivation |
US7367180B2 (en) * | 2004-03-05 | 2008-05-06 | Ford Global Technologies Llc | System and method for controlling valve timing of an engine with cylinder deactivation |
US7025039B2 (en) * | 2004-03-05 | 2006-04-11 | Ford Global Technologies, Llc | System and method for controlling valve timing of an engine with cylinder deactivation |
US7549283B2 (en) * | 2004-03-05 | 2009-06-23 | Ford Global Technologies, Llc | Engine system with mixed exhaust gas oxygen sensor types |
US7240663B2 (en) | 2004-03-19 | 2007-07-10 | Ford Global Technologies, Llc | Internal combustion engine shut-down for engine having adjustable valves |
US7063062B2 (en) * | 2004-03-19 | 2006-06-20 | Ford Global Technologies, Llc | Valve selection for an engine operating in a multi-stroke cylinder mode |
US7555896B2 (en) * | 2004-03-19 | 2009-07-07 | Ford Global Technologies, Llc | Cylinder deactivation for an internal combustion engine |
US7194993B2 (en) * | 2004-03-19 | 2007-03-27 | Ford Global Technologies, Llc | Starting an engine with valves that may be deactivated |
US7079935B2 (en) * | 2004-03-19 | 2006-07-18 | Ford Global Technologies, Llc | Valve control for an engine with electromechanically actuated valves |
US7066121B2 (en) * | 2004-03-19 | 2006-06-27 | Ford Global Technologies, Llc | Cylinder and valve mode control for an engine with valves that may be deactivated |
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US7072758B2 (en) * | 2004-03-19 | 2006-07-04 | Ford Global Technologies, Llc | Method of torque control for an engine with valves that may be deactivated |
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US7107947B2 (en) * | 2004-03-19 | 2006-09-19 | Ford Global Technologies, Llc | Multi-stroke cylinder operation in an internal combustion engine |
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US7032545B2 (en) * | 2004-03-19 | 2006-04-25 | Ford Global Technologies, Llc | Multi-stroke cylinder operation in an internal combustion engine |
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US7140355B2 (en) * | 2004-03-19 | 2006-11-28 | Ford Global Technologies, Llc | Valve control to reduce modal frequencies that may cause vibration |
US7017539B2 (en) * | 2004-03-19 | 2006-03-28 | Ford Global Technologies Llc | Engine breathing in an engine with mechanical and electromechanical valves |
US6938598B1 (en) | 2004-03-19 | 2005-09-06 | Ford Global Technologies, Llc | Starting an engine with electromechanical valves |
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US7165391B2 (en) | 2004-03-19 | 2007-01-23 | Ford Global Technologies, Llc | Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst |
US7383820B2 (en) | 2004-03-19 | 2008-06-10 | Ford Global Technologies, Llc | Electromechanical valve timing during a start |
US7128043B2 (en) * | 2004-03-19 | 2006-10-31 | Ford Global Technologies, Llc | Electromechanically actuated valve control based on a vehicle electrical system |
US7031821B2 (en) * | 2004-03-19 | 2006-04-18 | Ford Global Technologies, Llc | Electromagnetic valve control in an internal combustion engine with an asymmetric exhaust system design |
DE102004047984B4 (en) * | 2004-10-01 | 2016-02-04 | Volkswagen Ag | Method for operating an internal combustion engine with variable valve overlap |
ITBO20050193A1 (en) * | 2005-03-25 | 2006-09-26 | Ferrari Spa | INTERNAL COMBUSTION ENGINE WITH SHUTDOWN OF A CYLINDER PART AND RELATED CONTROL METHOD |
FR2893986B1 (en) * | 2005-11-30 | 2008-01-04 | Inst Francais Du Petrole | METHOD FOR CONTROLLING THE ADMISSION OF AN INTERNAL COMBUSTION ENGINE, ESPECIALLY OF PETROL OR DIESEL TYPE, AND MOTORS USING SUCH A METHOD |
US8277363B2 (en) * | 2007-11-07 | 2012-10-02 | GM Global Technology Operations LLC | Method and apparatus to control temperature of an exhaust aftertreatment system for a hybrid powertrain |
EP2058204B1 (en) * | 2007-11-07 | 2013-05-22 | GM Global Technology Operations LLC | Method and apparatus to control temperature of an exhaust aftertreatment system for a hybrid powertrain |
US8073610B2 (en) * | 2007-11-07 | 2011-12-06 | GM Global Technology Operations LLC | Method and apparatus to control warm-up of an exhaust aftertreatment system for a hybrid powertrain |
US9429090B2 (en) * | 2008-06-04 | 2016-08-30 | Fca Us Llc | Method of estimating catalyst temperature of a multi-displacement internal combustion engine |
US8402942B2 (en) * | 2008-07-11 | 2013-03-26 | Tula Technology, Inc. | System and methods for improving efficiency in internal combustion engines |
JP4725653B2 (en) * | 2009-01-30 | 2011-07-13 | トヨタ自動車株式会社 | Operation control device for multi-cylinder internal combustion engine |
US8646252B2 (en) * | 2010-01-08 | 2014-02-11 | GM Global Technology Operations LLC | Preventing catalyst damage during misfire event |
US9650971B2 (en) | 2010-01-11 | 2017-05-16 | Tula Technology, Inc. | Firing fraction management in skip fire engine control |
US9359918B2 (en) * | 2010-10-29 | 2016-06-07 | General Electric Company | Apparatus for reducing emissions and method of assembly |
US8689541B2 (en) | 2011-02-16 | 2014-04-08 | GM Global Technology Operations LLC | Valvetrain control method and apparatus for conserving combustion heat |
US8707679B2 (en) | 2011-09-07 | 2014-04-29 | GM Global Technology Operations LLC | Catalyst temperature based valvetrain control systems and methods |
US8788182B2 (en) | 2011-09-07 | 2014-07-22 | GM Global Technology Operations LLC | Engine speed based valvetrain control systems and methods |
JP5287959B2 (en) * | 2011-09-26 | 2013-09-11 | トヨタ自動車株式会社 | Control device for internal combustion engine |
EP2657484B1 (en) * | 2012-04-24 | 2015-03-04 | Ford Global Technologies, LLC | Externally ignited combustion engine with partial shut-down and method for operating such a combustion engine |
US9239037B2 (en) | 2012-08-10 | 2016-01-19 | Tula Technology, Inc. | Split bank and multimode skip fire operation |
DE102012022153B4 (en) | 2012-11-10 | 2019-01-24 | Volkswagen Aktiengesellschaft | Method for regeneration of at least one particle filter, control device and motor vehicle with such a |
US10161325B2 (en) | 2013-01-09 | 2018-12-25 | Cummins Ip, Inc. | Thermal management control using limited bank operation |
US9494090B2 (en) | 2013-03-07 | 2016-11-15 | GM Global Technology Operations LLC | System and method for controlling an engine in a bi-fuel vehicle to prevent damage to a catalyst due to engine misfire |
US9212610B2 (en) | 2013-03-15 | 2015-12-15 | Tula Technology, Inc. | Engine diagnostics with skip fire control |
US9732686B2 (en) | 2013-08-15 | 2017-08-15 | Ford Global Technologies, Llc | Variable displacement engine control system and method |
US9840971B2 (en) | 2013-08-15 | 2017-12-12 | Ford Global Technologies, Llc | Variable displacement engine control system and method |
KR101534932B1 (en) * | 2013-10-21 | 2015-07-07 | 현대자동차주식회사 | Bank controlling method of vehicle using the CDA |
WO2015077359A1 (en) | 2013-11-21 | 2015-05-28 | Tula Technology, Inc. | System for managing catalytic converter temperature |
US9074549B1 (en) | 2014-03-24 | 2015-07-07 | Cummins Inc. | Aftertreatment thermal management strategies for internal combustion engines having multiple cylinder banks |
US9457789B2 (en) | 2014-05-13 | 2016-10-04 | GM Global Technology Operations LLC | System and method for controlling a multi-fuel engine to reduce engine pumping losses |
US9708993B2 (en) * | 2015-02-04 | 2017-07-18 | Ford Global Technologies, Llc | Method and system for exhaust catalyst warming |
DE102015008722A1 (en) * | 2015-07-04 | 2017-01-05 | Man Truck & Bus Ag | Internal motor heating by increasing the load |
KR20170024853A (en) * | 2015-08-26 | 2017-03-08 | 현대자동차주식회사 | engine control method and engine control system |
US10066559B2 (en) * | 2015-10-27 | 2018-09-04 | Ford Global Technologies, Llc | Method and system for engine control |
US11053828B2 (en) | 2015-11-11 | 2021-07-06 | Tula Technology, Inc. | Separately determining firing density and pumping density during firing density transitions for a lean-burn internal combustion engine |
US10823029B2 (en) | 2015-11-11 | 2020-11-03 | Tula Technology, Inc. | Determining firing density of a skip fire controlled lean-burn engine using air-fuel ratio and exhaust temperatures |
US11560818B2 (en) | 2015-11-11 | 2023-01-24 | Tula Technology, Inc. | Lean burn internal combustion engine exhaust gas control |
CN108350818B (en) | 2015-11-11 | 2022-01-21 | 图拉技术公司 | Lean burn internal combustion engine exhaust temperature control |
DE102016204908A1 (en) * | 2016-03-24 | 2017-09-28 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling an internal combustion engine |
US10287945B2 (en) | 2017-01-26 | 2019-05-14 | Cummins, Inc. | Increase aftertreatment temperature during light load operation |
US11199118B2 (en) | 2018-08-27 | 2021-12-14 | Ford Global Technologies, Llc | Systems and methods for reducing cold start emissions for autonomous vehicles |
WO2020204928A1 (en) * | 2019-04-04 | 2020-10-08 | Cummins Inc. | Cyclical applications for internal combustion engines with cylinder deactivation control |
WO2021150359A1 (en) | 2020-01-24 | 2021-07-29 | Cummins Inc. | Dynamic cylinder deactivation life factor to modify cylinder deactivation strategy |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5334017A (en) * | 1976-09-13 | 1978-03-30 | Nissan Motor Co Ltd | Control equipment of number of cylinder to be supplied fuel |
US4165610A (en) * | 1976-12-10 | 1979-08-28 | Nissan Motor Company, Limited | Internal combustion engine with variable cylinder disablement control |
JPS58573B2 (en) * | 1978-06-16 | 1983-01-07 | 日産自動車株式会社 | Fuel supply cylinder number control device |
JPS5874841A (en) | 1981-10-28 | 1983-05-06 | Nissan Motor Co Ltd | Cylinder number-controlled engine |
JP2845048B2 (en) | 1992-09-04 | 1999-01-13 | 三菱自動車工業株式会社 | Engine cooling system with cylinder deactivation mechanism |
JP3577728B2 (en) * | 1993-12-03 | 2004-10-13 | 株式会社デンソー | Air-fuel ratio control device for internal combustion engine |
US5374224A (en) * | 1993-12-23 | 1994-12-20 | Ford Motor Company | System and method for controlling the transient torque output of a variable displacement internal combustion engine |
US5460129A (en) | 1994-10-03 | 1995-10-24 | Ford Motor Company | Method to reduce engine emissions due to misfire |
US5490486A (en) | 1994-10-05 | 1996-02-13 | Ford Motor Company | Eight cylinder internal combustion engine with variable displacement |
DE4445779A1 (en) * | 1994-12-21 | 1996-06-27 | Fev Motorentech Gmbh & Co Kg | Method for controlling a multi-cylinder internal combustion engine in the cold start and warm-up phase |
US5497745A (en) | 1995-02-24 | 1996-03-12 | Ford Motor Company | Engine control for enhanced catalyst warm up while maintaining manifold vacuum |
US5970943A (en) | 1995-03-07 | 1999-10-26 | Ford Global Technologies, Inc. | System and method for mode selection in a variable displacement engine |
US5867982A (en) * | 1995-06-02 | 1999-02-09 | Tengblad; Roger | System for reducing emissions in catalytic converter exhaust systems |
US5600947A (en) | 1995-07-05 | 1997-02-11 | Ford Motor Company | Method and system for estimating and controlling electrically heated catalyst temperature |
GB2304602A (en) * | 1995-08-26 | 1997-03-26 | Ford Motor Co | Engine with cylinder deactivation |
US5653102A (en) | 1995-08-31 | 1997-08-05 | Ford Global Technologies, Inc. | Air/fuel control system with catalytic converter monitoring for a variable displacement engine |
JPH0996216A (en) * | 1995-10-02 | 1997-04-08 | Denso Corp | Warming up device of catalyst used for exhaust gas purification |
US5540202A (en) | 1995-10-04 | 1996-07-30 | Ford Motor Company | Ignition timing control system for varying cold start spark advance during adaptive learning |
JP3275676B2 (en) * | 1995-12-14 | 2002-04-15 | トヨタ自動車株式会社 | Air-fuel ratio sensor heater control device |
WO1997040266A2 (en) * | 1996-04-19 | 1997-10-30 | Engelhard Corporation | System for reduction of harmful exhaust emissions from diesel engines |
US5956941A (en) | 1996-10-15 | 1999-09-28 | Ford Global Technologies, Inc. | Method and system for estimating a midbed temperature of a catalytic converter |
US5722236A (en) | 1996-12-13 | 1998-03-03 | Ford Global Technologies, Inc. | Adaptive exhaust temperature estimation and control |
US5758493A (en) * | 1996-12-13 | 1998-06-02 | Ford Global Technologies, Inc. | Method and apparatus for desulfating a NOx trap |
US6205776B1 (en) * | 1998-02-24 | 2001-03-27 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ration control system for multi-cylinder internal combustion engine |
US6237330B1 (en) * | 1998-04-15 | 2001-05-29 | Nissan Motor Co., Ltd. | Exhaust purification device for internal combustion engine |
US6164065A (en) * | 1999-11-12 | 2000-12-26 | Ford Global Technologies, Inc. | After treatment system for a variable displacement engine |
US6560959B2 (en) * | 1999-12-06 | 2003-05-13 | Denso Corporation | Exhaust gas purification apparatus of internal combustion engine |
JP2001227369A (en) * | 2000-02-17 | 2001-08-24 | Honda Motor Co Ltd | Control device for cylinder resting internal combustion engine |
JP2002013420A (en) * | 2000-06-28 | 2002-01-18 | Toyota Motor Corp | Cylinder fuel injection type spark ignition internal combustion engine |
US6381953B1 (en) * | 2000-12-07 | 2002-05-07 | Ford Global Technologies, Inc. | Exhaust gas oxygen sensor temperature control for a variable displacement engine |
US6415601B1 (en) * | 2000-12-07 | 2002-07-09 | Ford Global Technologies, Inc. | Temperature management of catalyst system for a variable displacement engine |
-
2000
- 2000-12-07 US US09/732,262 patent/US6415601B1/en not_active Expired - Lifetime
-
2001
- 2001-11-28 DE DE10158177A patent/DE10158177B4/en not_active Expired - Fee Related
-
2002
- 2002-03-05 US US09/683,933 patent/US6739123B2/en not_active Expired - Lifetime
-
2004
- 2004-05-03 US US10/838,942 patent/US6938410B2/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070079795A1 (en) * | 2005-10-12 | 2007-04-12 | Gebby Brian P | Method of managing engine torque upon loss of engine coolant |
US7204235B1 (en) * | 2005-10-12 | 2007-04-17 | Daimlerchrysler Corporation | Method of managing engine torque upon loss of engine coolant |
WO2015163892A1 (en) * | 2014-04-24 | 2015-10-29 | Cummins Inc. | Cylinder deactivation for catalyst drying |
US20170074185A1 (en) * | 2014-04-24 | 2017-03-16 | Cummins Inc. | Cylinder deactivation for catalyst drying |
US10794307B2 (en) * | 2014-04-24 | 2020-10-06 | Cummins Inc. | Cylinder deactivation for catalyst drying |
US10690071B1 (en) * | 2018-12-12 | 2020-06-23 | Denso International America, Inc. | Control system for variable displacement engine |
US10781762B2 (en) | 2018-12-12 | 2020-09-22 | Denso International America, Inc. | Control system for variable displacement engine |
US10961930B2 (en) | 2018-12-12 | 2021-03-30 | Denso International America, Inc. | Control system for variable displacement engine |
US10690036B1 (en) | 2018-12-20 | 2020-06-23 | Denso International America, Inc. | Diagnostic test for engine exhaust system |
Also Published As
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US6938410B2 (en) | 2005-09-06 |
DE10158177B4 (en) | 2008-06-12 |
US20040206071A1 (en) | 2004-10-21 |
US6415601B1 (en) | 2002-07-09 |
US6739123B2 (en) | 2004-05-25 |
DE10158177A1 (en) | 2002-06-27 |
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